Video shows one of two brazen robbers barging into beauty salon and holding up customers. Photo: NYPD

Chilling new video shows two thugs barging into a beauty salon and terrorizing and robbing customers and workers at gunpoint.

One of the bandits appears to bumble at one point, accidentally pointing his handgun at the back of his accomplice’s head while waiving the weapon around to threaten patrons about 6 p.m. last Sunday.

The surveillance footage shows the first gunman, 6-foot-2 and 180 pounds, entering El Truco Hair Salon on Ogden Avenue and ordering people to the back of the shop. He wore a black hoodie, a Yankees ball cap and black pants. He is followed by his accomplice.